Phytoextraction of salts by Atriplex nummularia lindl. under water stress in saline sodic soils

被引：17

作者：

de Souza, Edivan R. ^{[1
]}

Freire, Maria B. G. dos S. ^{[1
]}

do Nascimento, Clistenes W. A. ^{[1
]}

Montenegro, Abelardo A. de A. ^{[2
]}

Freire, Fernando J. ^{[1
]}

de Melo, Hidelblandi F. ^{[3
]}

机构：

[1] DEPA UFRPE, BR-52171900 Recife, PE, Brazil

[2] DTR UFRPE, Recife, PE, Brazil

[3] Univ Fed Rural Pernambuco, Recife, PE, Brazil

来源：

REVISTA BRASILEIRA DE ENGENHARIA AGRICOLA E AMBIENTAL | 2011年 / 15卷 / 05期

关键词：

phytoremediation; halophytes; salt affected soils; PHYTOREMEDIATION; TOLERANCE;

D O I：

10.1590/S1415-43662011000500007

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

This study aims to evaluate the growth, production and extraction of salts by Atriplex grown on saline-sodic soil under water stress conditions and to compare soil properties before and after their cultivation. The experiment was carried out in a greenhouse during 134 days growing Atriplex nummularia in pots with 20 kg of saline sodic soil with four levels of soil moisture (35, 55, 75 and 95% of field capacity) with a control (soil without plant). The experiment was performed in a randomized block with eight replications. The high concentrations of Ca2+, Mg2+, K+, and especially Na+ and Cl-in leaves of Atriplex nummularia, associated with high dry matter production characterizes this species as phytoextraction of salts, extracting through leaf and stem: 644, 758, 1059 and 1182 kg ha(-1) at 35, 55, 75 e 95% of field capacity, respectively. The variables of the exchangeable cations (Ca2+, Mg2+, K+, sum of bases) and total organic carbon remained stable between the beginning and end of the experiment in all treatments, while Na+ and exchangeable sodium percentage decreased after cultivation of the plant. The Atriplex responded to soil moisture with respect to biomass production and salts extraction.

引用

页码：477 / 483

页数：7